Answer:
Most of the immigrants who came to America through Ellis Island were from eastern and southern Europe.
Explanation:
I believe the answer is b
They stopped farming and growing crops on one location and started growing and farming crops at another location. This enabled the soil to recuperate and gain the required minerals which makes good soil also fertile
Hopefully, this link will help:
http://www.aish.com/ci/w/48955181.html
:D
